Apologies if I've missed this previously but which way round do J1/J2 (uPA68HA) go? I can't identify the manufacturer to look up their datasheet. Thanks.
See Post#25 of this thread for datasheet
Merci beaucoup. Mine don't look like that datasheet though, there isn't the 45 degree notch in one corner, see attached photo.
It's allright, it's the N of the old Nec Logo with the stylised N embossed on left (pin1).
Be carefull when soldering, the pcb layout is mirrored between left and right channel of the board. Upa on left has pin 1 on left and Upa on right is reversed (180° rotation), pin 1 on right (relative to top / front view of the board).
See Teabag's blog : http://www.diyaudio.com/forums/blogs/tea-bag/1340-salas-dcg-3-preamplifier-dcstb-power-supply.html
Ah right, thanks again. So the left pin in my photo is 1D on the PCB, just to be sure.
Thanks for the link to Tea-Bag's blog too - I looked for it yesterday but only found his Group Buy blog.
1D : not sure, I do not have the pcb under my hand and photos are'nt good quality enough, but pin 1 are identified by the white marker on silkscreen.
1D= Drain one
Left hand channel's μPA faces the inputs/outputs connectors, right hand channel's μPA faces the MOSFETS. That's how they should be populating the board.
In other words: Where the pin designations on the silkscreen are, each chip's type & logo printed face should also be.
Left hand channel's μPA faces the inputs/outputs connectors, right hand channel's μPA faces the MOSFETS. That's how they should be populating the board.
In other words: Where the pin designations on the silkscreen are, each chip's type & logo printed face should also be.
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